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IMMEDIATELY AFTER PAYMENT YOU WILL RECEIVE A LINK TO ACTIVATE THE GIFT IN STEAM WITHOUT REGIONAL RESTRICTIONS!!!
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Additional content
The Steam version of Call of Duty: Black Ops - Mac Edition is required to run.


8 new multiplayer maps, 2 new zombie levels, 1 epic experience!

Maps
"Hangar 18," located in a highly classified military base where you will fight through experimental weapons labs, the SR-71 test hangar, and a mysterious autopsy room;
"Drive-In," close quarters combat through a 60's American Drive-In theater, whose last showing was "Attack of the...", complete with a snack shack and a classic arcade;
"Silo," infiltrate a massive secret Soviet nuclear missile site under construction in this multilevel battleground; and
"Hazard," play through this coastal golf course fit for a Dictator, on the cliff sides of Cuba, where stocked clubhouses and manicured fairways meet snipers hidden in sand traps.
"Hotel", on the roof of a Cuban luxury hotel and casino against the vivid backdrop of old Havana.
"Convoy" delivers intense, close-quarters combat at the scene of an ambushed US military convoy.
"Zoo" takes you on a wild ride in an abandoned Soviet Russian Zoo, with danger at every turn.
"Stockpile" pits players in a remote Russian farm town housing secret WMD facilities.
Zombies!
"Call of the Dead" Play as a zombie-killing dream-team against a new and unnerving zombie menace. Set in a mysterious ice-covered remote Siberian island, a group of four fearless explorers fight for their lives amidst an army of bloodthirsty Russian zombies.
"Shangri-La" A legendary shrine is lost in an exotic jungle, where new undead species lurk within a treacherous labyrinth of underground caverns. Navigate through deadly traps and solve the dark secrets buried within the shifting walls of this zombie infested temple.

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I would really appreciate the feedback after the purchase.
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Instruction for the activation of the STEAM coupling:

1. You must download and install Steam http://steampowered.com/about (if not already installed)
2. Register a new account on Steam or go to an existing one.
3. The link received after purchase, it is necessary to copy and paste into your Internet browser, log in under your Steam account and take the gift to your LIBRARY or add it to the INVENTORY.
4. After activation, the game appears in the list of games and you can download it from steam.
5. The installation process (download) takes about 15-45 minutes (depending on your Internet channel).